Ooo - nice...
- https://www.tutorialspoint.com/computer_logical_organization/cpu_architecture.htm
- https://www.semanticscholar.org/paper/Step-by-step-design-and-simulation-of-a-simple-CPU-Schuurman/9bf7eb9200a43b077c6fccea9f05bfb3b58f3406
- https://hackaday.com/2016/03/16/crawl-walk-run-planning-your-first-cpu-design/